I wanted a 5015 blower part cooler that didn't restrict my view of the extrusion and gave easy access to both bowden connector, and nozzle, without needing to unmount it. Not a common thing apparently so I made this. Designed for the Ender-2 but should also fit CR-10. I ran it for 4 days solid with no problems, good part cooling and stringing control. Its ridged and weighs in at 37g (2 shells, 3 top/bottom) printed at 0.2mm. Uses existing mounting bolts for carriage and 40mm fan. Blower needs 20mm bolt and nut to secure. Has slot for clamping hot-end wiring to shroud (zip tie).
Not a pretty design but it doesn't act like an air-paddle as it zips along the x-axis, and the entire cooler clears bed clips :)
Print carriage-side down to the bed. I've included a gcode file with included supports which are split inside the manifold for easier removal.
Don't add supports inside the blower air channel. Will be very difficult to remove and prints fine without them.